*{ margin:0; padding:0; }
.sd1,.sd2{
    width: 100%;
    height: 100px;

}

.sd2{position: absolute;position: relative;margin-top: -100px;}
.sd3{width: 100%;height: 50%;background-color: black;vertical-align:middle}
#tou1{width: 100%;height: 77px;background-color: orange;}
#xtb{margin-left: 200px;float: left;}
.ss{margin-top: -40px;margin-left: 280px;}
.tx{width:300px;height: 30px;border-radius: 20px 5px 5px 20px;margin-top: 0px;margin-left: 150px;}
.tx1{width:100px;height: 35px;border-radius: 5px 20px 20px 5px;margin-top: 0px;background-color: red;margin-left: -8px;}
.im{margin-left: 60px;}
.sd4 div{float: left;text-align:center;}
.xk{width: 120px;height: 35px;margin-right: 20px;
    margin-top:10px;line-height:32px;}
.xkcss{background-color: #FFFF00; border-radius: 20px 20px 20px 20px;
    margin-top: 5px;border:1px solid #000;}
.yl,.fb{width: 80px;height: 30px;border-radius: 5px 5px 5px 5px;
    border: 1px solid #28A745;margin-right: 0px;line-height:28px;margin-top: 10px;}
.yl{margin-left: 600px;margin-right: 20px;}
.fb{background-color:#28A745;color: white;}